<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script type="text/javascript">
    let person = {
        name: '张三',
        age: 18
    }

    let p = new Proxy(person, {
        set(target, propName, value) {
            console.log('${propName}被修改了，我要去更新界面了')
            // target[propName] = value
            Reflect.set(target, propName, value)
        }
    })

    let name = p.name
</script>
</body>
</html>